Rotary engine.



ALBERT DUPUIS, F EDMONTON, ALBERTA, (JANA.

ROTARY ENGINE.

Specification of Letters Iatent. Patented Aug. 28, 191 t.

Application filed May 25, 1915. Serial No. 30,438. r

To all whom it may concern: 7 lie it known that I, Aun :n'r Dorms, a subject of the King of Great Britain, residin at Edmonton, in the Province of Alberta an Dominion of Canada, have invented new and useful Improvements in Rotary Engines, of which the following is a specification.

This invention relates to engines of the rotary type the object in view being to produce an engine of the class described embodying in connection with a suitable casing, a rotor carrying movable blades against which'the motive agent acts, combined with novel and reliable means for forcing an explosive mixture during the expansion thereof from an outside combustion chamber to the combustion chamber or chambers of the as herein described, illustrated and claimed.

In the accompanying drawings Figure 1 is a side elevation of the engine showing the means. for charging the expansion chamber or chambers of the engine.

-Fig. 2 is a sectional view of the charging mechanism.

Fig. 3 is a sectional view of the cut off valve.

Referring to the drawings 1 designates the en 'ne casing, and 3 the engine shaft.

, txteriorly of the engine and preferably mounted thereon is a combustion chamber 11 from which pipes 12 lead to the several intake ports of the engine. At one end the combustion chamber 11. which is preferably in the formof a hollow cylinder is provided casing 18, the last named casing bein rovided with a port 21 to allow the ue to enter the combustion chamber 11 where it is lgnitedby a spark plug 22 connected with a source of electrical energy 23 such as a battery or magneto, the timing of the s ark being effected by providing the whee 17 with one or more circuit breaker blocks 24 in the electric circuit.

25 designates a carburetor from which a feed pipe 26 extends to the pump barrel or cylinder 13 adjacent to'which the pipe 26 is provided with a check valve 27 to prevent the fuel from being forced back to the carburetor by the compressing action of the piston 14. v In order to guard sure in the combination chamber 11, I provide a safety device shown as comprising a piston 28held seated by means of. a backing spring 29, the stem 30 of said piston bein connected to one arm of a lever 31 fulcrume intermediate its.ends on a support or arm 32, the other arm of said lever being conuected by means ofv a link 33 to the arm 34 of a. cut-off valve 35, said cut-off valve being closed automatically when the pressure in the chamber 11 becomes excessive. 36 designates the fuel supply tank from which a feed pipe 37 leads to the'carbureter 25. y

The operation of the mechanism is as follows. As the engine is turnedover, rotary motion is imparted to thereby operating the pump and drawing fuel through the pipe 26 from the carbureter to the pump cylinder in the suction stroke of the piston 14, the instroke of the piston forcing said fuel into the combustion chamber where at the proper moment it is exploded by the igniter or plug 22, the exploding charge passing through the pipe 12 tothe intake ports of the engine casing where still expanding it drives the rotor in a manner well understood by those familiar with the art to which this invention appertains. The wheel 17 in rotating also produces the spark at the plug 22 at the proper intervals. When the pressure in the combustion chamber 11 becomes excessive. it acts to force the valve 28 open thereby allowing the excessive pressure to escape and in such opening movement of the valve 28, the cut-off valve 35 is closed by means of the connections above described thereby automatically preventing further feed of the fuel from the carburetor to the combustion chamber; As soon as the presagainst excessive picsthe wheel 17" sure'in the chamber 11 falls to a safe point, the valve 28 is closed by means of the spring 29, said spring of course being of sufficientstrength to hold the valve 28 closedunder normal conditions.

The engine is adapted, to be operated by steam, compressed air, gas, or Water under pressure and when comprising the external combustion chamber, the rotor may be operated by any hydrocarbon oil such as gasolene, kerosene, petroleum and the like.

The combination with an engine, of means for charging the ,expansionchamber thereof comprising a combustion chamber located exteriorly of the body of the engine, a fuel supply device, a'cut-ofl valve controlling the latter, a pump [acting to force the fuel from said supply device to said combustion cham her embodyinga pump barrel opening at its said combustion chamber and controlling the a discharge end of the pump barrel, a pump operating wheel drivenby the engine shaft, and a spring loaded piston associated with said combustion chamber and operating under 'excessiv internal pressure to automatically close .the cut-ofi' valve of the fuel supply and again reopen said supply When the pressure is reduced to a normal point.

In testimony whereof I afiix my signature in presence of two witnesses.

ALBERT DUPUIS. Witnesses:

' PHILIPPE Dorms,

ELSIE H. PRATLEY. 

